RU2349400C1 - Operational cold-rolling mill stand - Google Patents

Abstract

FIELD: metallurgy.

SUBSTANCE: invention concerns rolling. Particularly it concerns operational pipes cold-rolling mill. Operational cold-rolling mill stand contains movable cartridge with body and forming roll, movable force bed with body, wedge-like screw-down gear and bearing rails. Movable force bed of rolling mill is outfitted by spacer block, mounted between its body and bearing rails. Bottom spacer block is fast connected to body housing and implemented with shank end, used as guide for cartridge body, and top spacer block with fixed on it spacer block bearing rails is fixed relative to housing lengthways with ability of in-vertical plane displacement.

EFFECT: it is provided increasing of specific speed and productivity of mill by means of reduction of movable mass of operating mill.

2 dwg

Description

The invention relates to rolling production and for improving the working stand of the cold rolling mill.

A known design of the working stand of the cold pipe rolling mill (patent No. 2088353 B21B 21/00, priority from 06/08/92), comprising movable work rolls, a movable power bed with support rails and a wedge pressing mechanism between the frame body and rails, movable rolls of the roll rotation drive and a lever drive for moving the rolls, rails and power frame. A disadvantage of the known design is that, in addition to the racks fixed in the bed, the working stand is equipped with movable rails for rotation and movement of the rolls and guides for these rails, which greatly complicates the operation of the mill (complicated setup, unstable relative position of the rolls, depending on the installation of four rails )

Of the known stands of cold rolling mills, the closest in technical essence is the stand described in the book: Shevakin Yu.F. and Seydaliev F.S. "Cold rolling mills of pipes", M., Metallurgy, 1966, p. 88, Fig. 33.

This cage contains a movable power bed with support rails, a movable roller cassette with rolls (rollers) and a lever-articulated drive for moving the power frame and cassette.

In a known design, the cassette body moves along the guides made in a movable bed. Since the guides on the cassette body are located at a considerable distance from the work rolls (rollers), the guides made on the bed significantly increase the length of the bed, which leads to an increase in the mass of the moving parts of the mill and reduces the speed of the mill.

The objective of the invention is to increase the speed and productivity of the mill by reducing the weight of the moving parts.

The task is achieved in that the working stand comprising a movable cassette with a housing and rolling rolls, a movable power bed with a housing, a wedge pressing mechanism and support rails interacting with the rolling rolls of the cassette, according to the invention, the movable power bed is equipped with intermediate plates mounted between its housing and support rails, while the lower intermediate plate is connected to the frame body motionlessly and is made with a shank serving as a guide for the cassette body, and the upper intermediate plate with the upper supporting rails fixed in it is fixed relative to the frame body in the longitudinal direction with the possibility of movement in the vertical plane.

To explain the invention, the following is a specific example of the working stand with reference to the accompanying drawings, in which:

figure 1 shows the working stand of the cold pipe rolling mill, a longitudinal section along the rolling line;

figure 2 is the same, cross section.

The working stand consists of cassette 1, bed 2, mechanism 3 for synchronizing the movement of the bed and cassette.

Cassette 1 consists of rolls 4, housing 5 with guides 6.

The bed 2 comprises a housing 7, support rails 8 and 9, a lower intermediate plate 10, an upper intermediate plate 11, a pressure wedge 12 with screws for its longitudinal movement 13 and 14.

The mechanism 3 for synchronizing the movement of the cartridge 1 and the frame 2 consists of a lever 15 and connecting rod rods 16-18.

The housing 7 of the frame 2 is made along the length equal to the length of the support rails 8 and 9. In this case, the intermediate plate 10 in contact with the cylindrical supporting surface in the housing 7 is fixed therein and is made with a shank, the length of which provides an orientation guide 6 of the housing 5 of the cassette 1 when it moves in the process of work.

Before starting work, the upper intermediate plate 11 with the help of the wedge 12 and screws 13 and 14 is installed so as to provide the necessary clearance between the rollers 4 of the cartridge 1. In the longitudinal direction, the upper intermediate plate is fixed with protrusions covering the housing 7 of the frame 2 from both ends . The contact of the wedge 12 with the cylindrical supporting surface of the housing 7 of the frame 2 allows you to ensure parallelism of the upper support rails 8 relative to the lower support rails 9.

In the process, the rod 18 leads the lever 15 in the reciprocating motion. Under the influence of the connecting rod rods 16 and 17, the cassette 1 and the bed 2 move reciprocally on a path proportional to the radii of the lever 15 at the points of its connection with the rods 16 and 17.

The rollers 4 are moved along the support rails 8 and 9, while the housing 5 of the cassette 1 moves along the shank of the lower intermediate plate 10.

The described execution of the working stand allows you to reduce the length of the housing 7 of the frame 2, thus reducing the mass of the moving parts and thereby increase the speed and productivity of the mill.

Claims (1)

The working stand of the cold rolling mill, comprising a movable cassette with a housing and rolling rolls, a movable power bed with a housing, a wedge pressing mechanism and support rails interacting with the rolling rolls of the cassette, characterized in that the movable power bed is equipped with intermediate plates mounted between its housing and supporting rails, while the lower intermediate plate is connected to the housing of the power bed motionlessly and is made with a shank serving as a guide for the cassette housing, and the upper KSR plate is formed therein with a fixed upper support rails and the frame is fixed relative to the housing in the longitudinal direction movable in the vertical plane.

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